var normalm = L.tileLayer.chinaProvider('TianDiTu.Normal.Map', {
        maxZoom: 18,
        minZoom: 5
    }),
    normala = L.tileLayer.chinaProvider('TianDiTu.Normal.Annotion', {
        maxZoom: 18,
        minZoom: 5
    }),
    imgm = L.tileLayer.chinaProvider('TianDiTu.Satellite.Map', {
        maxZoom: 18,
        minZoom: 5
    }),
    imga = L.tileLayer.chinaProvider('TianDiTu.Satellite.Annotion', {
        maxZoom: 18,
        minZoom: 5
    });



    var Gaode = L.tileLayer.chinaProvider('GaoDe.Normal.Map', {
        maxZoom: 18,
        minZoom: 5
    });
    var Gaodimgem = L.tileLayer.chinaProvider('GaoDe.Satellite.Map', {
        maxZoom: 18,
        minZoom: 5
    });
    var Gaodimga = L.tileLayer.chinaProvider('GaoDe.Satellite.Annotion', {
        maxZoom: 18,
        minZoom: 5
    });
    var Gaodimage = L.layerGroup([Gaodimgem, Gaodimga]);





var normal = L.layerGroup([normalm, normala]),
    image = L.layerGroup([imgm, imga]);

var baseLayers = {
    "地图": normal,
    "影像": image,
};
var overlayLayers = {};
